function RollingImageTrans(imageName, thumbnailName, eventName, winName) {
        this.Index = 0;
        this.ListItem = new Array(0);
        this.Name = imageName;
        this.Thumbnail = thumbnailName;
        this.tmRotate = null;
        this.nInterval = 4500;
        this.eventName = eventName;
        this.winTarget = winName;

        if (window.RollObject == null) window.RollObject = new Array(0);
        window.RollObject[this.Name] = this;

        this.install = function() {
            window.document.images[this.Name].onclick = this.goLink;
            if (this.ListItem.length == 0) return;
            this.tmRotate = setTimeout("window.RollObject['" + this.Name + "'].rotateTrans()", this.nInterval);
            var icons = document.getElementsByName(this.Thumbnail);
            for (var i = 0; i < icons.length; i++) {
                if (this.eventName == 'over') icons[i].onmouseover = new Function("window.RollObject['" + this.Name + "'].alterImage(" + i + ")");
                else icons[i].onclick = new Function("window.RollObject['" + this.Name + "'].alterImage(" + i + ")");
            }
        }

        this.addItem = function(Link, ImgSrc, Icon1, Icon2) {
            var itmX = { Link: "", ImgSrc: "", DefIcon: "", OvrIcon: "" };
            itmX.Link = Link;
            itmX.ImgSrc = ImgSrc;
            itmX.DefIcon = Icon1;
            itmX.OvrIcon = Icon2;
            this.ListItem[this.ListItem.length] = itmX;
        }

        this.alterImage = function(index) {
            var icons = document.getElementsByName(this.Thumbnail);
            if (this.Index == index) return;
            if (this.ListItem[this.Index].DefIcon != "") icons[this.Index].src = this.ListItem[this.Index].DefIcon;

            this.Index = index;
            this.imgTrans();
            clearTimeout(this.tmRotate);
            this.tmRotate = null;
            this.tmRotate = setTimeout("window.RollObject['" + this.Name + "'].rotateTrans()", this.nInterval);

        }


        this.goLink = function() {
            var name = this.getAttribute('name');
            var Roll = window.RollObject[name];
            clearTimeout(Roll.tmRotate);
            Roll.tmRotate = null;
            Roll.winTarget = "_blank"; //定义是否弹出新页面
            if (Roll.winTarget == '' || Roll.winTarget == null) {
                window.location.href = Roll.ListItem[Roll.Index].Link;
            } else {
                window.open(Roll.ListItem[Roll.Index].Link, Roll.winTarget);
            }
        }


        this.rotateTrans = function() {
            var icons = document.getElementsByName(this.Thumbnail);
            var itmX = this.ListItem[this.Index];
            if (itmX.DefIcon != "") icons[this.Index].src = itmX.DefIcon;

            this.Index += 1;
            if (this.Index >= this.ListItem.length) this.Index = 0;

            this.imgTrans();

            clearTimeout(this.tmRotate);
            this.tmRotate = null;
            this.tmRotate = setTimeout("window.RollObject['" + this.Name + "'].rotateTrans()", this.nInterval);
        }


        this.imgTrans = function() {
            var icons = document.getElementsByName(this.Thumbnail);
            var itmX = this.ListItem[this.Index];
            if (itmX.OvrIcon != null && itmX.OvrIcon != "") icons[this.Index].src = itmX.OvrIcon;
            try {
                document.images[this.Name].filters[0].apply();
                document.images[this.Name].src = itmX.ImgSrc;
                document.images[this.Name].filters[0].play();
            } catch (e) {
                document.images[this.Name].src = itmX.ImgSrc;
            }
        }
}